A hotel maintenance crew wants to estimate how many of the 12,000 lamps in their 30-story hotel need a new lightbulb. Which of the following is a random sample of lamps to be inspected? (1 point)
- Selecting 50 lamps on the first floor
- Selecting 50 lamps throughout the hotel on different floors
- Selecting 50 lamps in rooms that have not been used in the past month